Manufacture of gummed strips



3 0 9 1 Y D .N u B G 5 June 29 1926.

MANUFACTURE OF GUMMED STRIPS Original Filed Nov. 23, 1925 j Patented June 29, 192 6,

ITEID STATES PATN OFF'IQE.

BENJAMIN G. Bunn or NABHUA, NEW HAMPSHIRE, ASSIGNOR- 'ro nasnua GUMMED &; COATED PAPER COMPANY, OF NASHUA, HEW HAMPSHIRE, A 003- ronarron or Massacnusnrrs.

I manunaorunn on animal) srnrrs.

Original application flled'november 23, 1925, Serial No. 70,887." Divided and this application filed This application is a 'division ofm aplication filed November 23, 1925, erial o. 7 0,887, which became Letters Patent No..

1,582,449, April 27 1926.

The invention relates to the production of dry gummed sheet material in the form of strips, of the character commonly known as stay strip material which is usually commercialized in the form of coils from which suitable lengths can be severed for use in strengthening the corners of cartons or boxes, or other uses.v

It is customary to so make the material with longitudinal marks or scores that when a strip is being applied to use, such as on the corner of a box, it will bend "along a mid-width line so that the strip will extend equal distances from the corner'onto both sides of the box. Of course a single score line is preferably employed to best effect.

this result, and said score line should be at the exact mid-width of the strip, regardless of the width of the strip.

One of the objects of the present inven-- tion is to produce gu'mmed stay strips having score lines in the gum only, without any weakening of the body (paper or cloth) of the strips, either by cutting into said body or forming grooves therein.

Another object is to produce such strips in an economicalmanner, each with a score line in the gum accurately at its mid-width, whether the strips are narrow or wide. I attain this last mentioned object by effecting the scoring while the sheet material, having a dry coatingof gum, is being cut into a plurality of strips side by side. And this is preferably done while said material is being operated upon by what is known as a slitting and re-winding machine one type of which is illustrated in Letters Patent No. 1,484,842,,dated February 26, 1924.

With the abovementioned objects in view, the invention consists in the method and the machine substantially as hereinafter described and claimed.

Of the accompanying drawings Figure 1 is a plan view of so much of a slitting machine equipped with my improvements as is necessary to" an under standing thereof.

Figure 2 is a side elevation of the same.

Figure 3- is a detail side elevation of the,

February 25, 1928. Serial No. 90,481.

particular features of my invention which,

in the present instance, comprises an attachment to a slitter of the general type illustrated in the Patent 1,484,842 referred to;

.Figure 4 is a'plan view of a piece of scored strip, as produced according to my invention. v Figure 5 represents a section on line;5-5 of-Figure 4, on a. scale enlarged to properly illustrate the strip.

Similar reference characters designate similar parts or features in all of the views. A portlon of the frame of the machine is indicated at 12; said frame supporting cutter shafts'l3, 14:, provided with cooperating disk cutters 15. It is customary in slitting and re-winding machines of the type illustrated in the patent'referred to, to Vary the number of cutting disks and the spacing thereof along their shafts, according to the widths of the strips into which the sheet a:

is to be divided.

In the embodiment of my invention illustrated, a roll or smooth-surfaced bar'l6 is mounted in the frame of the machine, and the sheet or Webw provided with a coating of dry gum passes over said roll or bar on its way to the cutters 15 which divide the web into strips.

Loosely mounted on 'a tie rod 17 are blocks 18 the positions of said blocks along the tie rod. being determined by c0llars'19 secured to the tie rod between the blocks. Extending through each block 18 is a rod 20 having at one end, above the roll 16, a a clamp couple or head21 in which a sharppointed scoring implement 22 is clamped and secured at. the proper angle to press on the gum coating and crush it without affecting the layerwhich carries the gum.

In practice I have found phonographneedles to make effective scoring implements. The points thereof bear on the dry gum carried by the web m where the latter travels over the roll or bar 16.

Adjustably mounted on the other end of each-rod 20 is a block 23 in which is mounted a rod 2 1, the said rod 24 extending above the. needle-carrying rod 20 and having a weight 25 adjustably mounted thereon. By adjusting the rods and weights, the needles 22 will be caused to bear on the dry gum coating of the web 00 with more or less pressure according-to the character of the gum) coating on the web. A thick or very hard coating requires that the needles be caused to bear on thecoating with heavier pressurethan a thin or soft coating. It is important that the pressure shall be such that the dry gum will be crushed without any cutting or grooving operation on the body. layer b (Fig. of the web. The constructionv enables this to be done, so that the paper or cloth layer 6 will not be weakened in any manner by the scoring operation.

Practicallyit leaves the layer 6 uniformly.

flat from side to side, with two. stripes of gum c separated by a scored line a which exposes the surface of the layer-b.

To counteract any tendency of the needlecarrying rods 'to-vibrate and result in imperfect scoring, it is desirablethat some spring connections be made so that inertia or momentum of the weights will not cause vibrations. To this end I provide a spring 26 connecting each weight rod 24 with a collar 19,-and I havealso found it desirable to employ a light rubber band to act as a spring for the same purpose. Each rubber band 27 connects a screw 28 of a-wei'ght25' its needle exactly in line =-with the middle of the space between cutters that are to de;' termine the width of thestri scored by that In other words, w 'Ie' the needles 22 act on the web before it is cut, the cutters needle.

(when they and the scoring units area-djusted according to the intended widths of the; strips) 'sever the web along lines equidistant'from the-score lines so that each score will be at the exact mid-width of each cut strip.

With the mechanism illustrated and described, it is possible for a machine to'produce, simultaneously, scored strips of different widths instead of uniform widths. For instance, some of the dlisk'cutters 15 may be two inches apart and others on the same shafts may be one inch apart. It is then only necessaryjto adjust the scoring.

unit's, along the rod 17 so that their needles will be in 'alinement with the'mid-width of the spaces between the cutting disks.

It is to'be understood that by the terms needles, and paper, employed herein, I do not limit myself to an exact definition of either term. Any pointed implementcapable of effecting the scoring may be used, and the term paper is to beunderstood as employed for the sake of brevity as appl ing.to any web material. Furthermore, t e

That is,

sheet of coated material into a plura ing means being term gum-is employed as ajjgenerie term for any coatin that adheres-to l' the Web. And of course t e scored strips may be employed for-purposes otherthanstrictly stay strips. Y a .1.

I do not claim herein the scored strip material which is the product of the method and'machine hereinbefore .described, as the same forms the subject matter of my application filed November 23,1925, Serial No. 70,887, which application became Letters PatentNo. 1,582,449, April 27,- 1926.

Having now described my invention, I claim 1.'Themethod of making scored stay strip material, consisting in subjecting a coating of'dry gum'carried b the body of the material to a'progressive y effected line of ressure tending to crush the dry gum wit out weakening the bod of the material.

2. The method'o making stay strips, consisting in cutting a sheet of material having a dry gum coating into a plurality of strips and simultaneously therewith scoring the said. coating.

3. The method of making stay strips,-consisting in cutting a sheet of material having a dry coating into a plurality of strips and simultaneously therewith subjecting the coating of each strip to pressure along a line at the mid-width thereof.

4. The method of making coated strips with score lines, consisting in cutting a it of strips and simultaneously therewith sub jecting the mid-width portion of the coating of each strip to a degree of pressure that crushes the said coating.

ing a plurality of scored strips of coated material,consisting in efiecting a plurality of lines of scoring while a web of the ma terialis being cut into a plurality of strips.

6. The method of simultaneously producinga plurality of scored strips of 'dry-gumcoated material, consisting in causing a web 5. The method of simultaneously producof the material to travel, progressively forlning parallel lines of scoring in the coating, and then cutting the web along lines between the scored lines.

7. A machine for operating on a travelling coated web, said machine having cutters for converting the web into strips, and means for scoring the coating on the web on its way to the cutters.

8. A machine foroperating on a travelling for converting the web into strips, and means for scoring the coating on the web on its way to the cutters, said cutters and scoradjustable relatively to the width of the web.

In testimony whereof I have afiixed my signature.

, BENJAMIN G. BUNDY. 

